Tire carrying rim



Qct. 11, 1932. H. w. KRANZ ET AL TIRE CARRYING RIM Filed June 5, 1928 Patentecl Ocf. 11, 1932 d UNITED STTES PATENT OFFICE I-IABRY w. KRAITZ, CHARLES s@ HOLDER, ANID HARRY H. BOUND, DIE LAKEWOOD, 01110, ASSIGNORSTO. zum CLEVELALND NVELDING COMPANY 01a CLEVELANID, 01x10, A

conroimmmn 01 omo EIBE cAumzmq BIM Appiication fiied June 5 1928; Seiial, N6. 282,900.

The present invent-ion, relating, es indicated, so pneumat1c t1re r1ms end the1r manufacture, has more especialreferenceto transversely split rims of the collztps'ible and demountable type used in connection witn straight-sided tires; end its principal object is the processing suchxrims in order a0 pos'1 tively constiairi the adjacent ends. to assume their normal end aligned relation af'ter having been radially displaced end over'lapped during the operation of removing and rep lacing the riin relativ6ly to a i;ire or ti1e cas'mg.

Transversely sp1it rims 'of the type referred t0- after having been repeat-edly Sprung und reduced in, diameter f0r alle purpose 015 faci1- -itating their removalfrom, end replacement within' the comparatively ineXtensible beads 01 tires. 01' tire casings, usually acquire, end thereafher permanently retain, an undesired end ob-j ectionable spiralsnape whichprevents the ends from ssuming 'their "normal and aligned relation to each'other; makes it diffi cult tc manipulate the rim in the intended manner; interferes with i-ts proper lockirig; offen damages the casings.arid inner tubes; end s0metimes distorts the rim 130 such an extent as so impair its fitment t0 the fel1y of a These eifects are all attpibutable to wheel. an unavoidable straining 01' bending cf the metal of the rim beyond its limit cf elasticity, this resulting in a permanent deformation end maln'ng itfimpossible f01 the rim to ims- *uced by imprper manipulation.

sumeits normal annular sha'pe without a quite .commonly seve're -hammering or levering, whi'ch frequently results in even greaterdis tortion und makes succeeding collapsing end expanding operationsincreasingh difficult.

This invention, with the object cf providing a tire rim Wh0se ends will reassume their normal relation withoutforcible assistance,

panded into locking position, conterhplates' working the ri1n metal to impart addition'al elasticity; render it capable 01 more effectually resisting deforx'nation; und able. t0 compensate f0r any slight deformation pro- In general, and as illustrative cf thetj pe of operations invo1Ved, the process may cons1st in preformihg partsof th e rim circumference in such a way as to compact end densify the metal; make it more resilient, und either impart atensiohal 01 reactive endency contrary to thestressest0which the rim is subjected, 01 a compensatory tensional orre coiling tende ncy having the eflect of neutral izing such distortion as results from collapsing the rim improperly 01 maintaining it in collapsed condition f0r considerable periods 0 t-ime.-nasmuch as this invention is particulatly we1l adapted t0 rims having transverse chordal splits end therefore more O1 less distinct overl&pping end underlying ends', ehe actua1 operations Will be described with relation t0 such ende so designated es Ehe wer end under ends, respectively, a1- thoughthe principle is, cf courseequally applicable t0 radially split rim s end with substantially the same advantages as attend its application tc rims cf the character described. The invention, then, in one form andj 'when employed in connection with ribbed rims of rather heavy and rigid metal may take the form cf im pact or\ spanking operations performed upon substantially the between dies having substantially the same crcss-sectmnalshape 01' contour as the rim buba slightly longer radius of peripheral curvature, and that half of the rim proximate to theover end being similarly tensionedin by dies having a slightly shorter circumferenftial radius of curvature these two operations serving 130 increase the resilience of the rim metaland imparting to the under and over halves o1 Segments an augmented ability to resist the radially opposed stresses' to which the rim must yie1d When the under end is stressed radially inward, the over end redially outward and ehe two ends relatively d1splaced end broughtinto overlapping relation. It will be understood that such operations, because cf their eifect upon the rini metal,; compe1 the over half 0f the rim t0 move towards its center when released from a colla13sed C0ndition and, in a similar mann'er, c cmpel the under half to move radially outwrdwlien relea sed; these two opposed stood that the under Segment or half receives the most severe treatment in the collapsing operation, in fact, the over segment remain-' ing, as '1s the case, in about its usu'al expanded position is subjectecl t harclly any deforming strcsses ancl therefore may notbecome detri meritally deformed or distorted.

While our invention has beendescribed with relation to rims having transVerse chorda1 splits having attachecl means for assisting in preVenting reverse overthrow, it Will having been repeatedly displaced and 0Verlappecl during the necessary rim removing and replacing operations.

Other forms may be employed embodyingt-l1e features of our invention instead cf the' one l1ere explained, change locingj made in the form or construction, provided ehe elements stated by any of the followingdaims or the equivalent cf such stated elements be employed, whether produci ed by nur preferred method or by otl1ers embodying steps equiValent to t-hose stated in the following claims.

Wo therefore particularly point out and distinctly claim as our invention l. A transversely split tire -rim having parc of its circumference bent to a normal unstrained curvature greacer t-han the tire beacl curvature, ancl part of its circumference bent to a normal unstrained curvature smaller than the tire beacl curvature.

2. A transversely split tire rim having part ends defined by a transverse chordal split, the gart cf said rim proximate to the over end eing bent to a smaller radius of curvature than the radius of curvature of the rimengagin periphery cf the tire to be supported t ereby.

7. A tire rim having slightly overlapping ends defined by a t-ransverse chordal spl1t, the part of said rim proximate to the over end having a normal unstrained curvature less than the curvature of the rim-engaging periphery of the tire,and the part of said ri m proximate to the under encl having a normal curvature greater than the curvature of the rim-engaging periphery 0f the tire.

8. A transversely split tire rim having an inwardly displaceable end having a normal unstrained curvature greater than the eurvature cf the rim-engaging periphery of the tire.

9. A transversely split tire rim having an inwardly displaceable end having a normal unstrained curvature greater than the curva- .ture of the rim-engagir'1g periphery of the tire.

10. A tire rim having uncler and over ends defined by a transverse chordal split, the said rim having a normal unstrained curvature less tl1ah the curvature of the rim-en aging periphery of the tire through an arc 0 about 170 degrees extending from near such end to a point beyond the diametral point, und having a normal unstrainecl curvat-ure greater than the curyature of thc rim-engaging periphery 013 the tire through an arc of about 150 degrees from such diametral point toward the under end.

Signed by us, this 4th day of June, 1928.

HARRY W. KRANZ. CHARLES S. HOLDEN. HARRY H. BOUND.

of its circumference bent to a normal unstrainecl curvature slight-ly larger than the curvature of ehe rim-engaging periphery of the tire to be supported thereby.

3. A transversely split tire rim hairing part of its circumference bent to a normal unstrained curvature slightly smaller than the curvature of the rim-engaging periphery of thc tire to be supported thereby.

4:. A transversely split collapsible tire rim having parts of its circumference provided with curvat-ures urging its ends t0 move ou't cf alignment in directions opposite to the disalignment procluced by collapsing, und means for preventing such movement.

5. A tire rim having slightly overlapping ends defined loy a transverse chordal split, the part 01: saicl rim proximate to the under end being bent to a larger radius of curvature than alle raclius of curvature of the rim-engaging periphery of the tile to be supported thereby.

y 6. A tire rim having slightly overlapping 

